It takes 10 minutes to \( \mathrm{cool} \) a liquid from \( 61^{\circ} \mathrm{C} \) to \( 59^{\...

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It takes 10 minutes to \( \mathrm{cool} \) a liquid from \( 61^{\circ} \mathrm{C} \) to \( 59^{\circ} \mathrm{C} \). If room temperature is \( 30^{\circ} \mathrm{C} \) then find the time taken in cooling from \( 51^{\circ} \mathrm{C} \) to \( 49^{\circ} \mathrm{C} \).
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